EGNOS and Galileo - European GNSS Agency - Europa

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16Signals from space madeeven more accurateSatellite navigation signals are improved by what are knownas Satellite-Based Augmentation Systems (SBAS).To get a better idea: someone using a GPS receiver thathasn’t been augmented can only be sure of his or herposition to within 17 metres. An augmented signal can tellyou where you are to within three metres.Europe already has its own SBAS called the EuropeanGeostationary Navigation Overlay Service (EGNOS).This can work with both GPS and Galileo. All SBAS systemsare interoperable so that users – in particular airplanes –can use them wherever they are.This improvement is useful for many sectors and vital forthe aviation industry – airplanes using satellite navigationfor en-route and precision approaches need that level ofprecision. They also need an integrity function which notifiesthem, within a few seconds, when the underlyingGNSS is faulty.
17Where can we see the difference?Aviation – Safer, cheaper and more efficient, EGNOS provides the accuracy neededto guide pilots safely during their flight and onto runways. It makes it possible forlarger passenger airplanes to land at regional airports that are often not equippedwith ground-based navigation aids.Road – The improvements to the positioning accuracy EGNOS brings, makesit possible for more trains to use our infrastructure and for cars to find shorter,more fuel-efficient routes. Knowing exactly where each vehicle is letscompanies improve their logistics. It also means the police and otheremergency services get to where they are needed, faster.Agriculture – Saving farmers money, helping the environment andboosting crop yields, EGNOS means precision agriculture benefits not onlyfor those working on the land, but for the land itself. Using aerial imagersand other tools, it is now possible to work out just the right amount ofseeds to sow and how much fertiliser to use, on a field-by-field basis.Location-based Services – From our cars to our gadgets, thepersonal navigation devices we use benefit from the improved accuracyEGNOS provides. You might want to locate a friend nearby or you mightneed to be airlifted off a mountain – life-saving or just lifestyle, this extraaccuracy makes all the difference.Maritime – Port operations and coast guards, offshore exploration andfisheries management; the service EGNOS is bringing improves every aspectof maritime operations.
Page 2: Europe Direct is a service to help
Page 5: 5ForewordSteering by the stars - 21
Page 11 and 12: 11What services will Galileo offer
Page 13 and 14: 13Civil engineeringThis is one doma
Page 15: 15Up and running in two phases1. 2.
Page 19: 19Why we need a European boostto sa

EGNOS and Galileo - European GNSS Agency - Europa

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